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Thirty pregnant agoutis that ranged in size from small to medium and weighed between 2.5 and 3\u00a0kg underwent B\u2010mode and Doppler ultrasonography for the biometric evaluation of the foetal organs. The foetal aortic blood flow proved to be predominantly systolic, and the measured flow velocity was 78.89\u00a0\u00b1\u00a02.95\u00a0cm\/s, with a maximum pressure gradient of 2.12\u00a0\u00b1\u00a00.27\u00a0mmHg. The liver was characterized by its large volume, occupying the entire cranial aspect of the abdominal cavity, and it was associated cranially with the diaphragm and caudally with the stomach. The flow velocity in the portal vein was estimated to equal 12.17\u00a0\u00b1\u00a02.37\u00a0cm\/s, with a resistivity index of 0.82\u00a0\u00b1\u00a00.05. The gallbladder was centrally located and protruded cranially towards the diaphragm. The spleen was visualized as an elongated structure with tapered cranial and caudal extremities, and the foetal kidneys were visualized bilaterally in the retroperitoneal region, with the right kidney positioned slightly more cranially than the left. The morphological characterization and hemodynamic analysis of the foetal organs of black\u2010rumped agoutis via B\u2010mode and Doppler ultrasonography allow determination of the vascular network and of reference values for the blood flow required for perfusing the anatomical elements essential for maintaining the viability of foetuses at different gestational ages.<\/jats:p>","DOI":"10.1111\/rda.12803","type":"journal-article","created":{"date-parts":[[2016,9,30]],"date-time":"2016-09-30T05:24:08Z","timestamp":1475213048000},"page":"60-66","source":"Crossref","is-referenced-by-count":4,"title":["Organogenesis and foetal haemodynamics during the normal gestation of healthy black\u2010rumped agoutis (<i>Dasyprocta prymnolopha<\/i>, Wagler, 1831) bred in captivity"],"prefix":"10.1111","volume":"52","author":[{"given":"FCA","family":"Sousa","sequence":"first","affiliation":[{"name":"Faculty of Medical Science State University of Piau\u00ed Teresina PI 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